What does your friend with the tin foil avatar think about that? As he is a respected grower and a real good guy.
This is really an interesting post because I am having a somewhat heated debate with one of my Sensei's. Sensei #1 said pros only grow with HPS and preferably DE HPS. I tried to talk to him about COBs but he will not listen.
QB boards are so new that it will a total waste of time.
Sensei #2 is ready to fully embrace QB Boards.
Note that both of these Sensei gurus are in the same league as our tin foil hat friend.
Sensei #1 pulls the numbers that your friend pulls. I am pulling for QB boards because Spring will be coming and the heat of HPS is too much.